EP1535957A1 - Thermoisolierplatte - Google Patents
Thermoisolierplatte Download PDFInfo
- Publication number
- EP1535957A1 EP1535957A1 EP04015297A EP04015297A EP1535957A1 EP 1535957 A1 EP1535957 A1 EP 1535957A1 EP 04015297 A EP04015297 A EP 04015297A EP 04015297 A EP04015297 A EP 04015297A EP 1535957 A1 EP1535957 A1 EP 1535957A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thermoisolierplatte
- ptfe
- hollow
- spheres
- microns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C2033/023—Thermal insulation of moulds or mould parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
Definitions
- the invention relates to a Thermoisolierplatte for external insulation of tools based on fillers containing thermostable plastics, according to the Preamble of claim 1.
- Tempered pressing tools of all kinds unnecessarily consume without external insulation a lot of energy and require long heating and cycle times; it's also hard to ensure even heat distribution in the tool. So far have been as Thermoisolierplatten for external insulation of tools, for example, such based on glass fiber reinforced polyester or phenolic resins or of Pressed and sintered polytetrafluoroethylene (PTFE) and silica powder used.
- PTFE polytetrafluoroethylene
- silica powder used.
- polyester resins are not very chemically resistant manufactured thermal insulation panels suffer from the cleaning in basic ultrasonic baths.
- Thermal insulation plates made of PTFE and silica powder are indeed chemically resistant, but they have a relatively high thermal conductivity of about 0.29 W / mK.
- the invention is therefore based on the object, a chemically resistant Thermal insulation panel with low thermal conductivity, low density and good provide mechanical workability for external insulation of tools.
- EP-A 304 699 are composites with low dielectric constant PTFE and 50 to 95% by weight hollow glass microspheres described. you will be prepared by mixing PTFE powder with the hollow spheres and a Lubricating, rolling, extruding into a film, removing the lubricant, Heating and sintering, wherein the PTFE assumes a fibrous structure. For example a 0.15 mm thick film is described. The films can be used as electrical insulation material, for example for cable insulation or for printed circuits.
- the plastic used is PTFE ("Teflon”), preferably with a mean particle size of 10 to 80 microns.
- the hollow spheres can be made of chemically resistant glass, of ceramic or of consist of high temperature resistant thermoplastics. Your middle one Diameter can be within wide limits between 0.1 and 300 microns, preferably between 1 and 200 ⁇ m and in particular between 10 and 150 ⁇ m. They are in amounts of from 5 to 70, preferably from 10 to less than 50 wt%, and especially in amounts of from 12 to 40% by weight contained in the Thermoisolierplatten. At levels well above 50% by weight, the impact resistance of the panels suffers.
- the Hollow spheres preferably have a compressive strength of 2 to 40 MPa. Preference is given to hollow glass spheres made of glass with high chemical resistance.
- PTFE powder with the hollow spheres mixed, cold pressed in a mold at pressures of 4 to 40 MPa and then at temperatures above the softening range of PTFE, preferably sintered between 350 and 400 ° C, with compact plates with smoother Surface arise. Also sintering the powder / hollow sphere mixture with Laser beams or microwaves is possible.
- the plates according to the invention have a thickness of 3 to 15 mm, preferably from 4 to 12 mm and especially from 5 to 10 mm.
- the plates according to the invention receive a - later aligned to the tool surface - corrugation, z.b. in the form of square pits, z. a depth of 1 mm and an area of 5 x 5 mm. In the application state they form together with the Tool surface closed cells, thereby further reducing the Thermal conductivity is achieved.
- the plates can additionally with a on or be coated on both sides heat reflection layer, z.b. with high temperature paints with reflective fillers, such as silver powder, aluminum flakes or mica. A PTFE dispersion with metal particles can also be applied become. By baking the paint or the dispersion, the durability be improved against abrasion. Furthermore, reflective, thin metal foils be glued on.
- Thermoisolierplatten are flexible, they can for example be bent and kinked. You can work them well, for example by water jetting, drilling, milling, turning and grinding. They are shock and impact resistant, chemically resistant, water resistant and easy to clean. They have a low density in the order of 1 to 1.5 g / cm 3 and a low thermal conductivity, measured according to DIN 52612, of preferably less than 0.25 W / mK, in particular from 0.05 to 0.20 W. / mK.
- Thermoisolierplatten can z.b. Dimensions of 1 x 1 m have; you can screwed onto the tool, clamped or pushed into brackets become. You can z.b. for the isolation of injection molds for the production of molded parts made of thermoplastic materials, as well as for the isolation of Press tools for the manufacture of rubber and silicone rubber parts be used.
- a particle mixer PTFE powder with a mean particle size of 30 microns with hollow glass spheres with a ball diameter of 50 microns, a compressive strength of 20 MPa and a bulk density of 0.27 g / cm 3 for three hours mixed.
- the weight ratio of hollow glass spheres to PTFE powder is 20:80.
- the compound is allowed to rest for several hours after mixing to ensure venting.
- a flexible die made of a thermoplastic material with a milled negative structure is placed in a steel frame, which is located in a one-floor press. After filling the mixture, a stamp is placed. By moving the press together and slowly raising the pressure to 15 MPa, the powder is deaerated and pressed into a so-called green compact.
- the plate After careful demolding of the plate, it is sintered in a high-temperature oven at 370 ° C for three hours. The heating and cooling rate is 1 ° C / min. The result is an 8 mm thick plate in the format 1 x 2 m. Their density is 1.3 g / cm 3 , the thermal conductivity 0.15 W / mK. It is coated with a silver silicone paint. This reflection layer further reduces the radiation loss.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
- Compounds Of Unknown Constitution (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Secondary Cells (AREA)
- Organic Insulating Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
- Building Environments (AREA)
Abstract
Description
Zum Pressen wird eine flexible Matrize aus einem Thermoplastmaterial mit eingefräster Negativstruktur in einen Stahlrahmen eingelegt, der sich in einer Einetagenpresse befindet. Nach dem Einfüllen des Gemischs wird ein Stempel aufgelegt. Durch Zusammenfahren der Presse und langsames Hochfahren des Drucks auf 15 MPa wird das Pulver entlüftet und zu einem sogenannten Grünling gepresst. Nach vorsichtigem Entformen der Platte wird diese in einem Hochtemperaturofen bei 370°C drei Stunden gesintert. Die Aufheiz- und Kühlrate beträgt 1 °C/min.
Es entsteht eine 8 mm dicke Platte im Format 1 x 2 m. Ihre Dichte beträgt 1,3 g/cm3, die Wärmeleitzahl 0,15 W/mK. Sie wird mit einem Silbersilikonlack beschichtet. Durch diese Reflexionsschicht wird der Verlust durch Strahlung weiter verringert.
Claims (11)
- Thermoisolierplatte mit einer Dicke von 3 bis 15 mm auf Basis von Füllstoffe enthaltendem Polytetrafluorethylen (PTFE) zur Außenisolierung von Werkzeugen, gekennzeichnet durch einen Gehalt von 5 bis 70 Gew% Hohlkugeln mit einem mittleren Durchmesser von 0,01 bis 300 µm.
- Thermoisolierplatte nach Anspruch 1, dadurch gekennzeichnet, dass die Hohlkugeln aus Glas, Keramik oder einem hochtemperaturbeständigen thermoplastischen Kunststoff bestehen.
- Thermoisolierplatte nach Anspruch 1, dadurch gekennzeichnet, dass sie 10 bis weniger als 50 Gew% Hohlglaskugeln und 90 bis mehr als 50 Gew% PTFE enthält.
- Thermoisolierplatte nach Anspruch 1, dadurch gekennzeichnet, dass die Hohlkugeln einen mittleren Durchmesser von 10 bis 150 µm aufweisen.
- Thermoisolierplatte nach Anspruch 1, dadurch gekennzeichnet, dass sie eine Wärmeleitzahl von weniger als 0,25 W/mK aufweisen.
- Thermoisolierplatte nach Anspruch 1, dadurch gekennzeichnet, dass sie eine geriffelte Oberfläche aufweisen.
- Thermoisolierplatte nach Anspruch 1, dadurch gekennzeichnet, dass sie einoder beidseitig mit einer Wärmereflexionsschicht überzogen ist.
- Thermoisolierplatte nach Anspruch 7, dadurch gekennzeichnet, dass die Wärmereflexionsschicht aus einem Hochtemperaturlack oder einer PTFE-Dispersion mit reflektierend wirkenden Füllstoffen besteht.
- Verfahren zur Herstellung der Thermoisolierplatte nach Anspruch 1 durch vermischen von PTFE- Pulver mit den Hohlkugeln, kalt verpressen und versintern bei Temperaturen oberhalb des Erweichungsbereichs des PTFE.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass bei Drücken von 4 bis 40 MPa verpresst wird.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass bei Temperaturen von 350 bis 400 °C versintert wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20318330U | 2003-11-25 | ||
DE20318330U DE20318330U1 (de) | 2003-11-25 | 2003-11-25 | Thermoisolierplatte |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1535957A1 true EP1535957A1 (de) | 2005-06-01 |
EP1535957B1 EP1535957B1 (de) | 2006-05-10 |
Family
ID=34442535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04015297A Expired - Lifetime EP1535957B1 (de) | 2003-11-25 | 2004-06-30 | Thermoisolierplatte |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1535957B1 (de) |
AT (1) | ATE325834T1 (de) |
DE (2) | DE20318330U1 (de) |
DK (1) | DK1535957T3 (de) |
ES (1) | ES2264070T3 (de) |
PT (1) | PT1535957E (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ302851B6 (cs) * | 2009-10-07 | 2011-12-14 | Vysoké ucení technické v Brne | Tepelne izolacní kompozitní plast |
EP2400825A1 (de) | 2010-06-23 | 2011-12-28 | Bayer MaterialScience AG | Isolationszusammensetzung für gedruckte Elektronik in einem Leiterkreuzungspunkt |
FR3067964A1 (fr) * | 2017-06-27 | 2018-12-28 | Compagnie Plastic Omnium | Moule pour matiere plastique |
EP3950287A4 (de) * | 2019-04-02 | 2022-11-30 | Airbus Operations, S.L.U. | Modulare abdeckung für ein formwerkzeug |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014006007A1 (de) | 2014-04-28 | 2015-10-29 | Tim Brandenburger | Verwendung eines Faserverbundwerkstoffs mit einer volumisierte Fasern enthaltenden Zwischenlage zur Ummantelung und/oder Abdeckung von beheizten Maschinenoberflächen sowie Verfahren zur Herstellung eines solchen Faserverbundwerkstoffs |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0304699A2 (de) * | 1987-08-28 | 1989-03-01 | Junkosha Co. Ltd. | Verbundstoff mit niedriger dielektrischer Konstante und Verfahren zu dessen Herstellung |
US5348990A (en) * | 1993-03-02 | 1994-09-20 | Hoechst Celanese Corp. | Low dielectric materials |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801564A1 (de) * | 1988-01-20 | 1989-08-03 | Wilfried Ensinger | Isoliersteg aus kunststoff |
GB9017203D0 (en) * | 1990-08-06 | 1990-09-19 | Shell Int Research | Polyolefin/filler composite materials and their preparation and use |
DE4040432A1 (de) * | 1990-12-18 | 1992-06-25 | Strabag Bau Ag | Formmasse aus kunststoff |
BR9306155A (pt) * | 1992-03-31 | 1998-06-23 | Grace W R & Co | Isolamento de tubo de espuma sintática termoplástica |
DE19535332A1 (de) * | 1995-09-22 | 1997-04-17 | Hans Schumann | Dämmelement |
DE19728794C1 (de) * | 1997-07-05 | 1999-07-01 | Bayer Ag | Polyurethan-Isolierstege mit kleiner Wärmeleitzahl sowie die Verwendung von Isocyanurat aufweisenden Gießmassen zu deren Herstellung |
DE19860878C2 (de) * | 1998-12-18 | 2003-10-16 | Hermsdorfer Inst Tech Keramik | Füllstoff für organische und anorganische Polymere sowie Verwendungen eines Polymerwerkstoffes mit einem solchen Füllstoff |
-
2003
- 2003-11-25 DE DE20318330U patent/DE20318330U1/de not_active Expired - Lifetime
-
2004
- 2004-06-30 DK DK04015297T patent/DK1535957T3/da active
- 2004-06-30 PT PT04015297T patent/PT1535957E/pt unknown
- 2004-06-30 AT AT04015297T patent/ATE325834T1/de not_active IP Right Cessation
- 2004-06-30 DE DE502004000535T patent/DE502004000535D1/de active Active
- 2004-06-30 EP EP04015297A patent/EP1535957B1/de not_active Expired - Lifetime
- 2004-06-30 ES ES04015297T patent/ES2264070T3/es not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0304699A2 (de) * | 1987-08-28 | 1989-03-01 | Junkosha Co. Ltd. | Verbundstoff mit niedriger dielektrischer Konstante und Verfahren zu dessen Herstellung |
US5348990A (en) * | 1993-03-02 | 1994-09-20 | Hoechst Celanese Corp. | Low dielectric materials |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ302851B6 (cs) * | 2009-10-07 | 2011-12-14 | Vysoké ucení technické v Brne | Tepelne izolacní kompozitní plast |
EP2400825A1 (de) | 2010-06-23 | 2011-12-28 | Bayer MaterialScience AG | Isolationszusammensetzung für gedruckte Elektronik in einem Leiterkreuzungspunkt |
WO2011161050A1 (de) | 2010-06-23 | 2011-12-29 | Bayer Materialscience Ag | Isolationszusammensetzung für gedruckte elektronik in einem leiterkreuzungspunkt |
FR3067964A1 (fr) * | 2017-06-27 | 2018-12-28 | Compagnie Plastic Omnium | Moule pour matiere plastique |
WO2019001977A1 (fr) * | 2017-06-27 | 2019-01-03 | Compagnie Plastic Omnium | Moule pour matiere plastique |
EP3950287A4 (de) * | 2019-04-02 | 2022-11-30 | Airbus Operations, S.L.U. | Modulare abdeckung für ein formwerkzeug |
Also Published As
Publication number | Publication date |
---|---|
DE20318330U1 (de) | 2005-04-14 |
DE502004000535D1 (de) | 2006-06-14 |
ES2264070T3 (es) | 2006-12-16 |
ATE325834T1 (de) | 2006-06-15 |
DK1535957T3 (da) | 2006-09-18 |
EP1535957B1 (de) | 2006-05-10 |
PT1535957E (pt) | 2006-08-31 |
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